Super jealous of your EE, now with Chirpa being farmable I am going hard on all the Ewoks. Refreshing EE and Scouts nodes once per day. Once level 80 comes with extra nodes for them both it should only take 2-3 months to 7* those 2.
EE is interesting as I didn't know who or how to kill first. I ended up killing Rey and EE after his first turn so he couldn't revive her.
I think barriss is a wasted spot, can't remember your exact line up did you have RG in there as he would help greatly. Maybe dooku or lumi leader to add in dodge.
Lumi
RG
EE
Rey
Daka
Just not sure if Rey and lumi can put out all the damage needed. Would be crazy RNG though with all the stuns heals and revives